Mastering Route Redistribution: Bridging RIP and EIGRP Networks

Which command is used to redistribute routes between a RIP network and an EIGRP network?

• A. (config)#router rip
• B. (config)#redistribute eigrp AS NUMBER AND THEN METRIC 2
• C. (config)#router eigrp AS NUMBER
• D. (config)#redistribute rip

Answer: (B)

The command to redistribute routes between a RIP network and an EIGRP network includes both the EIGRP Autonomous System (AS) number and a metric value. This is essential because when redistributing routes from one routing protocol to another, specifying the metric helps ensure that the routes are treated appropriately in terms of cost by the receiving protocol. In this case, when using the command that involves redistributing EIGRP routes, the AS number identifies which EIGRP process to use, while the metric specifies the cost assigned to the redistributed routes. Thus, this command accurately fulfills the requirement for incorporating RIP routes into the EIGRP routing table, allowing the EIGRP router to understand how to treat these routes. For effective redistribution, it's crucial to understand the operation of both RIP and EIGRP, as each has its own metric and administrative distance, which will influence routing decisions. Without the AS number and proper metric, redistribution could lead to inefficient routing or even route flapping, where routes are continuously added and removed from the routing table.

When you're gearing up for the Cisco Certified Network Associate (CCNA) exam, mastering the ins and outs of routing protocols is a must. And one of the key players in this arena is the command used to redistribute routes between a RIP network and an EIGRP network. You know what? Having a grip on this will set you apart from those who merely skim the surface.

Let’s kick things off with a real brain-teaser: Which command do you think is the key to redistributing routes effectively? Here are your options:

• A. (config)#router rip

• B. (config)#redistribute eigrp AS NUMBER AND THEN METRIC 2

• C. (config)#router eigrp AS NUMBER

• D. (config)#redistribute rip

Drumroll, please! The golden ticket is B: (config)#redistribute eigrp AS NUMBER AND THEN METRIC 2.

Why is that, you ask? Well, here’s the thing: when you're redistributing routes, both the EIGRP Autonomous System (AS) number and a specific metric value are necessary. This duo doesn’t just act like sidekicks; they ensure the routes are evaluated correctly by the receiving protocol based on cost. Think of it as assigning a value to a precious antique—without the right appraisal, you wouldn’t know its true worth. Similarly, without the metric, the routes might end up in a jumbled mess of bad decisions.

Understanding how this command works is crucial. The AS number specifies which EIGRP process you’re tapping into, while the metric is the lifeblood that tells the EIGRP router how to treat these incoming routes. Without these components, you might run into a headache of inefficient routing or worse, route flapping—where the routes keep hopping on and off the table like an indecisive dancer.

But let’s not stop at just knowing that command. Knowing how RIP and EIGRP function can save you from a slew of complications. Each protocol has its own unique metrics and administrative distances that shape how they make decisions about the best path. It's like choosing your favorite restaurant—you want to make sure you're picking the one that won’t just fill you up but is also worth the trip!

So, if you want to cement your understanding and ace that CCNA, keep dipping back into these concepts. Equip yourself with knowledge, experiment with commands in your lab, and test them out with real networking scenarios. You'll not only grasp these protocols better but also boost your confidence when it comes time for that big exam.

Remember, every ounce of knowledge you gain brings you one step closer to becoming that go-to networking whiz. Are you ready to tackle this challenge? Let’s conquer that command-line together and ensure you’re more than prepared when the exam day comes knocking!